Move functions to settingslib for more code reuse

Bug: 110376110
Test: Tested on device
Change-Id: I2bbb8d01f675fc254e783b97b44d16f36846a416

tests/robotests/src/com/android/settings/location/LocationServicePreferenceControllerTest.java

@@ -67,7 +67,7 @@ public class LocationServicePreferenceControllerTest {
     @Mock
     private PreferenceScreen mScreen;
     @Mock
-    private SettingsInjector mSettingsInjector;
+    private AppSettingsInjector mSettingsInjector;
     @Mock
     private DevicePolicyManager mDevicePolicyManager;